Some unused values are present throughout the codebase, which can negatively impact code readability, especially as the project grows in size. Beyond being code smells, these unused values may, in some cases, slightly reduce performance depending on the JavaScript interpreter used, as unnecessary memory write and read operations could occur.

To address this issue effectively, I recommend using tools like SonarQube or Qodana to inspect the codebase for unused values and other similar inefficiencies. These tools can identify occurrences and provide insights into areas requiring attention. After detection, each instance should be manually reviewed to confirm whether it can be safely removed. By doing so, we can enhance code readability and maintainability while potentially optimizing performance.